Live from AT&T's 2012 Developer Summit keynote!

We're here at the Palms for the opening keynote at AT&T's annual Developer Summit. Last year's event brought us the Motorola Atrix 4G, HTC Inspire 4G and Samsung Infuse 4G, among plenty of other little nuggets. We're expecting to see another great showing, courtesy of AT&T Mobility CEO Ralph de la Vega, CTO John Donovan and CMO David Christopher, so read along as we bring you the updates as it happens.

11:23AM And we're done! Now off to grab some hands-on time.

11:23AM "We have a great 2012 in store."

11:23AM Stephen's off the stage, and Ralph is wrapping up the keynote.

11:22AM "We'll have a few announcements for you [at the press conference this afternoon]."

11:22AM "It's our plan to enter the North American market in a big way."

11:21AM "Nokia Lumia has opened the Windows Phone gateway to the entire world."

11:21AM Elop's also discussing the hundreds of millions of downloads Nokia sees each month, and that he's looking forward to shifting that into the Windows Phone environment.

11:19AM The new Nokia Windows Phone will have AT&T LTE.

11:19AM Ah, he's teasing us now. The main announcement will come at the press conference later this afternoon.

11:18AM "Our head-turning designs are winning awards."

11:18AM "We made a bold decision in February to embrace Windows Phone. It represented an opportunity to present an alternative. We saw the opportunity to differentiate, and you've seen the first results in this war of ecosystems in October."

11:17AM Elop's discussing the "shift" in mobile devices. It's more about ecosystems now, with the services that complete the mobile experience.

11:16AM "The entire Nokia team is absolutely thrilled to be in the US."

11:16AM Stephen Elop's on stage!

11:16AM "We're working to re-introduce him to the American market. We have bet on this person. i think he's the right person for the job. "

11:16AM "Finally, we have one more guest. Steve and I know him pretty well."

11:15AM Time for the obligatory photo opp.

11:15AM "You know how Steve has been talking about 'blah blah blah?'"

11:14AM "Windows Phone is so good, so smooth. I've been using this all the time!"

10:20AM While we wait for the vote, Glenn Lurie is out now. He's the President of Emerging Devices.

10:20AM Okay, so all three finalists are on stage now, and it's time to vote. Text 88222: if you vote for Action X-Ray, text APP1. HopiChest is APP2 and SleepBot is APP3. Now we're just missing Ryan Seacrest.

10:19AM Ha, love her shirt: "error 4:04 AM (sleep not found)"

10:18AM SleepBot helps improve people's sleep by tracking and scheduling your sleep, collects that data, and offers resources for you if you're having trouble sleeping.

10:17AM The final contestant is SleepBot.

10:16AM The next app uses mHealth to show a record of their health and share that record on Twitter or Facebook.

10:16AM It's also a nice idea for your doctor, so they know when and where your injuries have taken place.

10:15AM The app targets lovers of Extreme sports. If there's a head injury, the app can display an ad for a helmet.

10:14AM The first contestant is Action X-Ray, which allows you to keep track of your injuries.

10:14AM Ah, they're bringing 3 devs up to do a live pitch to the audience. Each one had less than 12 hours to code an app. The winner of the live pitch will get $5000 and Nickelback backstage tickets.

10:12AM The new AppCenter is found at developer.att.com/appcenter, and Jeff encourages all HTML5 and Android devs to check the beta out.

10:11AM AT&T's rolling out a next-gen AppCenter that will support HTML5 and Android, and will expand to other OS later.

10:10AM AT&T is making the ARO code open source later this year.

10:09AM Jeff is alone on stage now.

10:09AM ARO is available at developer.att.com/ARO.

10:09AM You can definitely tell that Jeff is reading his comments off a teleprompter.

10:09AM Jeff from Zynga is now explaining how much administrative overhead was causing inefficiencies with the user's energy consumption.

10:07AM "The benefits we saw reduced network traffic as well."

10:07AM Tom's explaining how Pandora was utilizing both CPUs, which was incredibly inefficient. "We were just kind of guessing (before ARO). ARO helped us learn how to utilize our app more effectively."

10:05AM Jeff: did ARO make a difference? Tom: it did. ARO showed us that we were using batteries faster than we needed to.

10:05AM Pandora was one of hte first companies to try the tool (ARO).

10:05AM He's bringing on Tom Conrad from Pandora and Jeff Zakrzerwki from Zynga.

10:04AM The tool will now be available on the website starting today.

10:04AM The optimizer utilizes two key tools: a data logger and an analyzer. The logger collects data samples. Transfer that info into the analyzer, and it shows your app's interaction with the network.

10:02AM Jeff's talking about the application resource optimizer. "it's going to help your apps run faster and use less power."

10:02AM Not bringing htem on, just introducing them actually.

10:01AM Now he's bringing on one of the other finalists: Electrify.

10:00AM The app allows you to remotely turn the power on the outlet on and off, and it looks like it measures the energy and cost savings.

9:57AM "The app we won the award with was version 1. This one here is the version we launched today,"

9:57AM People Power has been trying to solve the problem of Vampire Power.

9:56AM The winner of hte contest was people power.

9:55AM He's listing off a few green apps that were involved in AT&T's sustainability contest.

9:54AM There are now over 100 sustainability apps across iOS, Android and HTML5.